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Posts Tagged ‘offline maps’

Offline Maps and How to Get Started Part 1

Wednesday, August 17th, 2016

 

I thought it worthwhile pulling together a series of posts on offline maps and how to get started. This an area in which we have particular expertise.

Many of the most popular mobile apps available today include maps. Apps like Pokemon Go and Uber are two excellent examples. Built in GPS in smartphones and tablets has enabled users to ask a multitude of ‘where questions': Where is the closest Pok├ęStop? Where is my Uber driver?

The popularity of consumer mobile mapping apps is now moving to the enterprise, to save money, or make money. GIS is a technology which quietly sits behind many mobile enterprise mapping apps. GIS generates maps from raw data and allows users to ask both simple and complex ‘where questions’. More on GIS later.

Offline Maps and How to Get Started Part 1

Mobile maps often rely on wireless connectivity to work. As an example, when you see your Uber driver heading towards your location on the map, quietly in the background your smartphone is getting information back over wireless on the changing location of that driver.
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Offline or Disconnected Mobile ArcGIS How To

Wednesday, June 13th, 2012


Offline or disconnected mode is one of the most in demand client and potential client requests we receive. And yet the main spatial solution providers have only made small steps in this direction. Chatting with ESRI, offline ArcGIS is on their roadmap, but no major releases are planned in the near future. Our interest is cross-platform solutions. So recent iOS and Android specific announcements from the likes of Google, though very interesting, do not serve our clients well.

It was time for us to look into our own solution. We broke down the problem into manageable chunks, then conferred with Mansour at ESRI on the details. Let’s discuss at a high level these pieces.

Offline versus Online Mode

In code we can detect if a mobile device has online connectivity. If it does reach out over the network for map and server functionality. If offline look locally, to the device itself, for resources.

Local Storage

Mobile devices have varying amounts of local storage. They also come with so called lite databases. In offline mode we take advantage of these local resources.

Offline ArcGIS Visualization – Tile Packages

Let’s imagine we have an ArcGIS Online web map we wish to view on our mobile in disconnected mode. Using ArcGIS 10.1 we can now generate a tile package of the layers used in the web map. These .tpk files vary in size, we need to be careful when generating these packages, particularly thinking about the capacity of the mobile device targeted for the mobile ArcGIS app. But once the tile package has been generated this need be stored on the mobile device. Note, tile packages which include base map tiles will need agreement with ESRI since there are various licensing agreements attached to the source of these base tiles.

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